a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8

General

Target

a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe
Size

552KB
MD5

fec60d703c2dc1fd493fe16c7ff6fac0
SHA1

e5264760100beedf52886e684f15b5f84423be7a
SHA256

a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8
SHA512

23a7172d2b0cd82a542e83aec3a7375e02bc7bec3d3648c06b5a030c375afb04c24fc5fd8bc34a07a814cdd3083ed83cad04092f4983501f3bf24408aecf6309
SSDEEP

12288:Pw2VKYTnqYX09dTWbXv9BWtnFysQ9d87iBn1p+iG/8y4k:1KAnqYMdTWbXlenFQG+Bn1p+ftP

Score

7^/10

bootkit defense_evasion discovery persistence

Malware Config

Signatures

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000900000002347b-1.dat	acprotect

Executes dropped EXE 1 IoCs

pid	Process
640	skwigk.exe

Loads dropped DLL 2 IoCs

pid	Process
2940	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe
640	skwigk.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe
File opened for modification	\??\PhysicalDrive0	skwigk.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\skwigk.exe	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe
File opened for modification	C:\Windows\SysWOW64\skwigk.exe	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skwigk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2940	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe
2940	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe
640	skwigk.exe
640	skwigk.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2940	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe
Token: SeDebugPrivilege	640	skwigk.exe
Token: SeIncBasePriorityPrivilege	2940	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2940 wrote to memory of 4808	2940	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe	83
PID 2940 wrote to memory of 4808	2940	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe	83
PID 2940 wrote to memory of 4808	2940	a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe	83

C:\Users\Admin\AppData\Local\Temp\a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe
"C:\Users\Admin\AppData\Local\Temp\a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8N.exe"
1⤵
- Loads dropped DLL
- Writes to the Master Boot Record (MBR)
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2940
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\A3FC1B~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4808

C:\Windows\SysWOW64\skwigk.exe
C:\Windows\SysWOW64\skwigk.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Defense Evasion

Indicator Removal

1

T1070

File Deletion

1

T1070.004

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\V220101109.EPE

Filesize
492KB

MD5
756242a8209a3f4a813968f2e771b971

SHA1
fe1ddade1cbfb7d78d5908e611757a3f401082a4

SHA256
eefa691cb7cbcbfd81dee4c433cfbb1e2a604f9316ea2bb9f391b601470ecff6

SHA512
b217cca747a7105cbae0932e723349de614430f90442fb91763dd5881c2dd2658f055be4b850f39d0fe5ecfe82555bf41adc6583298ad59d54392a5a19144c08

Download Submit
C:\Windows\SysWOW64\skwigk.exe

Filesize
552KB

MD5
fec60d703c2dc1fd493fe16c7ff6fac0

SHA1
e5264760100beedf52886e684f15b5f84423be7a

SHA256
a3fc1bfe8ccd04a4e0add1ee7e470bbfc8c9f92af6c24b619703ce58074830c8

SHA512
23a7172d2b0cd82a542e83aec3a7375e02bc7bec3d3648c06b5a030c375afb04c24fc5fd8bc34a07a814cdd3083ed83cad04092f4983501f3bf24408aecf6309

Download Submit
memory/640-19-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/640-59-0x0000000000400000-0x00000000004AC000-memory.dmp

Filesize
688KB

Download
memory/640-282-0x0000000071120000-0x000000007127B000-memory.dmp

Filesize
1.4MB

Download
memory/640-10-0x0000000071120000-0x000000007127B000-memory.dmp

Filesize
1.4MB

Download
memory/640-11-0x0000000000620000-0x0000000000621000-memory.dmp

Filesize
4KB

Download
memory/640-13-0x0000000000F00000-0x0000000000F10000-memory.dmp

Filesize
64KB

Download
memory/640-218-0x0000000071120000-0x000000007127B000-memory.dmp

Filesize
1.4MB

Download
memory/640-90-0x0000000000F00000-0x0000000000F10000-memory.dmp

Filesize
64KB

Download
memory/640-79-0x0000000000620000-0x0000000000621000-memory.dmp

Filesize
4KB

Download
memory/640-72-0x0000000071120000-0x000000007127B000-memory.dmp

Filesize
1.4MB

Download
memory/2940-6-0x0000000004010000-0x0000000004020000-memory.dmp

Filesize
64KB

Download
memory/2940-0-0x0000000000400000-0x00000000004AC000-memory.dmp

Filesize
688KB

Download
memory/2940-2-0x0000000071120000-0x000000007127B000-memory.dmp

Filesize
1.4MB

Download
memory/2940-15-0x0000000071120000-0x000000007127B000-memory.dmp

Filesize
1.4MB

Download
memory/2940-14-0x0000000000400000-0x00000000004AC000-memory.dmp

Filesize
688KB

Download
memory/2940-3-0x0000000000C40000-0x0000000000C41000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads